Steam-generator



S (No Model.)

W. A. GRONDAHL.

STEAM GENERATOR.

No. 319,235. Patented June 2, 1885.

z7 I J i Wawawawmawawa WITNESSES: INVENTOR.

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1TB ill WILHELM A. GRONDAHL,

Marne or PORTLAND, onnoon.

STEAWMGENERATOR.

SPECIFICATION forming part of Letters Patent No. 319,235, dated June 2, 1885;.

Application filed November 20, 1884.

To all whom it may concern:

Be it known that I, WILHELM A. Ghou- DAHL, a subject of the King of Sweden and Norway, and a resident'of Portland, in the 5 county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Steam-Generators; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in whichi 5 Figurelisa side view of my improved steam boiler or generator, showing portions of the boiler-shell broken away. Fig. 2 is a vertical transverse sectional view of the same, taken on the line at m in Fig. 1; and Fig. 3 is avertical sectional view taken on the line y g in Fig. 1.

The same letters refer to the same parts in all the figures.

This invention relates to steam boilers or generators; and it has for its object to so construct the same as to produce the largest possible amount of heating-surface, and hence the greatest possible production of power in a boiler or generator of a given size.

With these ends in view my invention, which is applicable to sectional as well as to ordinary cylindrical boilers, consists in the improved construction and arrangement of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, A designates thebody or casing of my improved steamboiler, which is, in the main, of the usual construction, consisting of the cylindrical portion 13, at the front end of which is formed the firebox 0 with the water-legs D D.

E is the crown-sheet, which is angular or inverted-V-shaped, as shown, and which eX- tends back through the cylindrical portion of the boiler, where it is joined with another an- 5 gular or V-shaped sheet, F, so as to form the water-jacket. The inner sides of the waterlegs may be and are preferably corrugated, as shown at Gin Fig. 3 of the drawings, for the purpose which will be presently stated.

H H are water-pipes arranged in the fire brick-work, thereby rendering the device use- (No model.)

box of the boiler above the grate I, and in inclined positions, as shown, the lower ends of the said pipes being connected to the inner sides of the water-legs, and their upper ends to the inclined sides of the crown-sheet. By corrugating the inner sides of the water-legs, as shown, the lower ends of the water-pipes will be made to intersect the said corrugations at right angles, thereby rendering their connection more convenient and substantial. Inclined water-pipes J also connect the upper and lower inclined portions of the sheets or plates E and F throughout the length of the boiler, said pipes being arranged to intersect each other, as clearly shown in Figs. 2 and 3 of the drawings.

K is the steam-dome, and L L in Figs. 2 and 3 designate return fireflues, which may be employed whenever desired.

The operation and advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed.

The construction is simple and inexpensive. A very considerable heating-surface is gained; and the heated water rising or ascending through one set of inclined tubes will descend or settle at the opposite side, and again rise through the oppositely-inclined tubes, thus maintaining a constant and thorough circulation in the boiler.

It will also be seen that this boiler may be used efficiently and conveniently without any necessity for inclosing it in any foundation or 8 ful for portable as well as for stationary 5 boilers; also, that the principle of construction herein described may be readily applied. to sectional boilers by simply constructing each section with one or two sets of inclined tubes arranged to intersect each other in the manner shown.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States-- 1. In a steam-generator, the combination, with a boiler having an inverted-V-shaped or angular crown-sheet, an extension of which" extends throughout the length of the boiler, and a V-shaped sheet or plate connected with the I00 rearward-extension of the crown-sheet, of two with the two sets or series of water tubes sets or series of inclined water-tubes connectcrossing each other, as described, and the reing the said crown-sheet and its rearward exturn fire-fines, substantially as and for the pur- 1' 5 tension with the inner sides of the water-legs pose set forth.

5 and with the said V-shaped plate, substan- In testimony that Iclaim the foregoing as my I tially as and for the purpose set forth. own I have hereunto affixed my signature in 2. In a steam-generator, the combination of presence of two witnesses. a bo11er having an inverted-v-shaped crown- WILHELM A GRGNDAHL.

sheet provided with a rearward extension, as

10 described, and a V-shaped plate extending Witnesses:

rearwardly from the fire-box, and joined with CORD SENGSTAK, the rearward extension of the crown-sheet, F. G. EWALD. 

